Expansion of Product_{k>=1} (1 + x^k)^(2^(k-1)-1).

Terms

a(0) =1a(1) =0a(2) =1a(3) =3a(4) =7a(5) =18a(6) =41a(7) =99a(8) =227a(9) =538a(10) =1236a(11) =2872a(12) =6597a(13) =15166a(14) =34669a(15) =79150a(16) =180011a(17) =408616a(18) =925015a(19) =2089607a(20) =4709937a(21) =10595275a(22) =23788174a(23) =53312366a(24) =119271967a(25) =266399612a(26) =594077742a(27) =1322815256a(28) =2941225084a(29) =6530659320